package cn.com.higinet.dl.joa.controller;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;




import cn.com.higinet.dl.joa.view.Model;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;

@Controller
public class CaptchaImageCreateController {

	private Producer captchaProducer = null;  
	  
    @Autowired   
    public void setCaptchaProducer(Producer captchaProducer) {  
        this .captchaProducer = captchaProducer;  
    }  
  
    @RequestMapping (value="/captcha-image")  
    public Model handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {  
        response.setDateHeader("Expires" ,  0 );  
        // Set standard HTTP/1.1 no-cache headers.   
        response.setHeader("Cache-Control" ,  "no-store, no-cache, must-revalidate" );  
        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).   
        response.addHeader("Cache-Control" ,  "post-check=0, pre-check=0" );  
        // Set standard HTTP/1.0 no-cache header.   
        response.setHeader("Pragma" ,  "no-cache" );  
        // return a jpeg   
        response.setContentType("image/jpeg" );  
        // create the text for the image   
        String capText = captchaProducer.createText();  
        // store the text in the session   
        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);  
        // create the image with the text   
        BufferedImage bi = captchaProducer.createImage(capText);  
        ServletOutputStream out = response.getOutputStream();  
        // write the data out   
        ImageIO.write(bi,"jpg",out);  
        try  {  
            out.flush();  
        } finally  {  
            out.close();  
        }  
        return null ;  
    }   
}
